How to Install MariaDB 10.3 on Debian 9 / Debian 8

Hello folks!. In this guide, we will cover how to install MariaDB 10.3 on Debian 9 Stretch and Debian 8 Jessie. MariaDB is an open source database server released under the General Public License version 2. As of this writing, MariaDB 10.3 is the current major stable version of MariaDB, this will be supported until May 2023. For all features of MariaDB 10.3, check features page.